Sectional grate.



No. 882,860; BATENTED MAR. 24, 1908.

D. B. BAKERXS: J. A. .STBIN.

SEGTIONAL GRATB.

APPLICATION FILED-P1131 1907.

David B. a/,er&

John 9". I fi8b753wveutom m: on

ms PETERS can, WASHINGYON, u c.

UNITED STATES PATENT ()FFICE.

DAVID B. BAKER AND JOHN A. STEIN, OF HOQUIAM, WASHINGTON.

SEGTIONAL GRATE.

To all whom it may concern:

Be it known that we, DAVID B. BAKER and JOHN A. STEIN, citizens of the United States, residing at Hoquiam, in the county of Chehalis and State of Washington, have in vented a new and useful Sectional Grate, of which the followin is a specification.

The invention re ates to improvements in grates for boilers and furnaces.

The object of the present invention is to improve the construction of sectional grates, and to provide a simple and comparatively inexpensive one, in which both the gratesupporting means and the sections of the grate will be reversible and interchangeable, whereby the durability of life of the grate Will be materially increased.

A further object of the invention is to provide a sectional grate of this character, in which the various parts of each section will be uniformly heated to cause equal expansion and contraction, and in which also the sections will be maintained at a red heat to prevent accumulation of slag, and to cause all wood pitch and coal tar to be consumed, to keep the grate clean and to maintain a perfect draft, whereby the sections of the grate will be prevented from either melting or burning out.

Another object of the invention is to provide a grate, in which the means for supporting the sections will be maintained at a relatively low temperature to prevent the same from burning, warping or otherwise deteriorating.

With these and other objects in view, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended; it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing :-Figure 1 is a plan view of a portion of a grate, constructed in accord ance with this invention; Fig. 2 is a longitudinal sectional view of the same. Fig. 3 is a perspective view of the grate support.

Like numerals of reference designate corresponding parts in all the figures of the drawing.

1 designates a grate support, designed to be of a length coincident to the length of the Specification of Letters Patent.

Application filed February 2, 1907.

Patented March 24, 1908. Serial No. 355,398.

composed of parallel sides 2 and connecting ends 3. The parallel sides and ends have horizontal upper and lower edges or faces, and the upper edges or faces receive grate sections 4, which are interlocked with the support by means of projecting lugs or portions 5 of transverse pieces 6, located at intermediate points between the ends of the support, and connecting the sides and brac- I grate, and consisting of an oblong frame, I

ing the same to increase the strength of the j 3 said support. The support, which is provlded with similar upper and lower faces, is reversible and is adapted to be turned upside down, should the support warp or sag, but as the support is maintained at a relatively low temperature, as hereinafter more fully explained, and as it is uniformly heated, the durability of the support will be greatly increased and the liability to warp or sag materially lessened.

The oblong grate support may be constructed of any desired length to suit the size of the grate to be supported, and it is provided at its ends and at points opposite the cross pieces 6 with laterally extending spacing lugs 7 and 8, which space the several supports of a grate from each other. The open mgs between the sides of the support, and

also between the several supports, are ample 1 to permita free discharge. of the ashes from i the grate, and are adapted to afford a perfect draft.

The grate sections, which may be of any desired size, are constructed of a length to fit the supports on which they are to be mount t ed, and they are provided with transverse openings 9 of a length equal to the distance between the inner faces and the sides 2 ofthe support. The grate sections 4 are also provided at their side edges with notches 10, lo-

cated beyond and extending laterally from the outer side faces of the sides 2 of the grate support. The transverse openings 9 and the notches 10 form transverse bars or portions 11 and longitudinal connecting bars or portions 12, which have horizontal upper and lower faces to fit the upper faces of the sup ort 1. The notches 10 are formed by t e aterally projecting spacing lugs, which are located at the ends of the transverse bars 11, and each grate section is also provided at the ends of the longitudinal connecting bars with projecting spacing lugs. As the grate sections are provided with flat upper and lower faces, they are reversible' f independently of the supports, and they may be turned upside down, or end for end, and may also be interchanged, so that when the central grate sections, which are subjected to the greatest heat, and which burn out more quickly than the side and end sections, become impaired, the said central sections may be arranged at the outer portions of the grate, and the outer sections may be transferred to the center of the grate. This will enable a grate to last much longer than one where the sections are not interchangeable or reversible. Also by providing sections of this character, the parts of any particular section, whether the section be located at the center or outer portion of the grate, will be substantially uniformly heated and the contraction and expansion will be uniform, which will prevent the cracking incident to unequal expansion and contraction of the parts. Also the openings of the grate sections will permit a suflicient draft to cause the sections to be heated red hot to revent accumulationof slag, and to cause al wood pitch and turpentine to be consumed so as to maintain the grate in a clean conditlon and prevent the same from becoming clogged. As the sections will be prevented from becoming clogged, the super-heating and the consequent melting or burning out of the grate sections will also be prevented. Also the free passage of air over the grate support will maintain the latter at a relatively low temperature, so that the warping, burning and sagging incident to excessive heating will be eliminated.

The grate sections are detachably interlocked with the support and are held against 40 the transverse connecting portions 6.

relative longitudinal and lateral movement by means of lugs 13, arranged in pairs and projecting from the upper and lower edges of These lugs, which extend beyond the upper and lower faces of the sides 2, have vertical outer edges, and extend into the transverse openings of the sections of the grate, and the cross pieces and lugs may be of any desired number, and are adapted to engage any of the spaces or openings 9 of the grate sections. Two or more sets of lugs may be provided for each of the grate sections. The upper edges of the cross pieces 6 are oppositely beveled at 14 between the lugs 13 to permit any ashes in the openings, engaged by the lugs, to fall through the grate.

It will be seen that the sectional grate is exceedingly simple and inexpensive in construction, that it possesses great strength and durability, and that owing to the reversibility and interchangeability of the sections,

the grate may .be used until it is uniformly worn out. Also it will be clear that the grate sections may be replaced, when worn out, by new sections at. a comparatively low cost, without discardin the grate supports.

Having thus fully described our invention,

what we claim as new and desire to secure by Letters Patent, is 1- 1. A grate comprising a reversible support,- and a grate section laced thereon, said support being provide with corresponding up-' per and lower faces and adapted to be turned over to present the underside to the grate section and to counter-act sagging or warping.

2. A grate comprising a support having corresponding upper and lower faces and adapted to be turned up-side-down, and a grate section arranged upon the top of the support and having corresponding upper and lower faces to fit either the upper or lower face of the support and adapted to be reversed to present either face to the same.

3. A grate comprising a support having upper and lower faces and adapted to be turned upside-down, a grate section arranged upon the top of the support and having corresponding upper and lower faces to fit either the upper or the lower face of the support and adapted to be reversed to pre-- sent either face to the same, and means extending from the to to the bottom of the sup ort for interloc ing the grate section wit the same.

4. A grate comprising a reversible support adapted to beturned over to bring its underside to the top and consisting of a frame'and having lugs projecting beyond its upper and lower faces, and a reversible grate section provided with openings and adapted to receive the lugs, whereby it is interlocked with the support.

-5. A grate comprising a support consisting of a frame having a cross piece connecting the sides of the frame and provided with spaced lugs, an intervening beveled edge extending across the space between the lugs, and a reversible grate section having openings for receiving the lugs.

6. A grate comprising a reversible support adapted to be turned over to bring its underside to the top and consisting of an oblong frame having horizontal upper and lower edges, said frame being provlded with cross ieces havin u er and lower projecting ugs, and a plura ity of reversible grate sections provided with fiat upper and lower faces and having openings to receive the lugs, whereby they are interlocked with the support.

7. A grate comprising a grate section, and a reversible oblong grate support, upon which the grate section is laced, composed of parallel sides and ends iaving horizontal upper and lower edges, transverse ieces connecting the sides between the said ends and provided at the top and bottom of the support with grate-engaging lugs projecting above and below the upper and lower edges of the side bars, and spacing lugs extending later-- ally from the side bars at the ends and at the cross pieces and having horizontal upper and lower edges arranged flush with the u per an lower edges of the sides and ends of t e support, said support being provided with corresponding upper and lower faces and ada ted to be turned over to resent the undersi e to the grate section anc to counter-act sagging or warpmg.

8. A reversible oblong grate section provided at intervals with transverse oblong openings of uniform area at both the top and bottom of the section, said 0 enings forming transverse bars and longitu inal connecting bars arranged at right angles to each other and having horizontal upper and lower faces, said grate section being also provided with side and end spacing lugs located opposite the ends of the transverse and longitudinal bars, and having upper and lower faces arranged flush with the upper and lower faces of the said bars to form corresponding upper and lower faces to the grate section, whereby the latter is adapted to be turned up-sidedown to counter-act sagging or warping and to bring either of the said faces to the bottom, and a support having projecting engaging lugs adapted to fit in any of the oblong openings of the grate section.

In testimony, that we claim the foregoing as our own, we have hereto aflixed our signatures in the presence of two witnesses.

DAVID B. BAKER. JOHN A. STEIN.

Witnesses:

L. C. HOUSER, IDA I. ANNIs. 

